Answer:
False
Explanation:
It's false. When a rock falls in the water, it experiences the upthrust force which is much greater than that of air resistance in the air.
Answer:
high
Explanation:
Heat of vaporization is the amount of energy needed to change one kilogram or one mole of a liquid substance to a gas at the same temperature (normally known as the boiling point). If the inter-molecular forces of attraction in the liquid are strong, more energy will be needed to break the bonds, changing the liquid to a gas. So the enthalpy of vapourization of a liquid with strong intermolecular forces will be high
Answer:
7.4m/s
Explanation:
a=(v-u)/t
v= final velocity
u= initial velocity
note: when a body starts from rest,initial velocity,u=o
a= 18.5-0/2.5
a=7.4m/s
Answer:
W= 
Explanation:
a) Yes, In the absence of external torques acting on the system, the angular momentum is conserved.
b) By the law of conservation of energy angular momentum
c) work done in pulling the chord W= Final kinetic energy(K_2)-Initial Kinetic energy(K_1)
Now,
J
Therefore, Work done W=
Transfusion: The act of transferring blood from a healthy person, and giving it to another person.
